Usually in a case where investigators find it difficult to gather evidence, they could ask for an accused to become an approver to get crucial evidence and in return, the accused could get lighter sentence or escape punishment, the experts said.

The magistrate, meanwhile, extended their judicial remand till January 19, and asked them to appear before the court concerned on January 7 as per the production warrant issued to them after taking cognisance of the charge sheet filed against the accused on January 3.